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Method, device and system for signal shielding of wireless communication system

A wireless communication system and signal shielding technology, applied in the field of communication, can solve problems such as difficulty in determining the interference frequency range, affecting normal communication of the wireless communication system, base station interference, etc.

Inactive Publication Date: 2013-01-09
赵训威
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the traditional jammer can prevent the communication between the terminal of the wireless communication system and the base station within the shielding range, its fatal problem is that it is difficult to determine the interference frequency range of the frequency scanning method, and it often interferes with other normal devices within the shielding range that do not need interference. The wireless communication system may also cause interference to the base station of the wireless communication system within the shielding range, which will seriously affect the normal communication of the wireless communication system

Method used

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  • Method, device and system for signal shielding of wireless communication system
  • Method, device and system for signal shielding of wireless communication system
  • Method, device and system for signal shielding of wireless communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] Embodiment 1. The signal interception process of the long-term evolution (LTE) system, such as image 3 shown, including:

[0114] Step 301, carrier frequency detection; acquiring carrier frequency.

[0115] Step 302, symbol timing detection.

[0116] Step 303, cell ID identification within the group.

[0117] Step 304, wireless frame timing detection; acquiring frame timing information.

[0118] Step 305, cell ID group identification; obtaining cell ID group information.

[0119] Step 306, physical broadcast channel (PBCH) multi-antenna group identification; acquiring antenna information.

[0120] Step 307, identifying the length of the cyclic prefix (CP) of the subframe where the PBCH is located; acquiring CP length information.

[0121] Step 308, time and frequency synchronization; performing time and frequency synchronization with the wireless communication system.

[0122] Step 309, read system information, including information such as system bandwidth, Phys...

Embodiment 2

[0124] Embodiment 2, signal interception process of wideband code division multiple access (WCDMA) system, such as Figure 4 shown, including:

[0125] Step 401, carrier frequency detection; acquiring carrier frequency.

[0126] Step 402, time slot synchronization;

[0127] Step 403, scrambling code group identification and frame synchronization; obtaining scrambling code group information.

[0128] Step 404, scrambling code identification; acquiring scrambling code information.

[0129] Step 405, read system information.

[0130] The information to be obtained in steps 401 and 402 can be obtained using the primary synchronization channel (P-SCH), the information to be obtained in step 403 can be obtained using the S-SCH channel, and the information to be obtained in steps 404 and 405 can be obtained using the primary synchronization channel (P-SCH). Control Physical Channel (P-CCPCH) acquisition.

Embodiment 3

[0131] Embodiment 3, the signal interception process of code division multiple access and its evolution (CDMA1X or EVDO) system is as follows Figure 5 shown, including:

[0132] Step 501, carrier frequency detection; acquiring carrier frequency.

[0133] Step 502, identifying the offset of the local pseudo-random (PN) sequence; acquiring PN sequence offset information.

[0134] Step 503, time synchronization, which can be synchronized by obtaining long code state (LC_STATE), system time (SYS_TIME), pilot offset (PILOT_PN) and other parameters;

[0135] Step 504, read system information.

[0136] The information to be obtained in steps 501 and 502 can be obtained using the forward pilot channel (F-PICH), the information to be obtained in step 503 can be obtained using the forward synchronization (F-SYNC) signal, and the information to be obtained in step 504 It can be acquired using the Forward Paging Channel (F-PCH), Forward Broadcast Control Channel (F-BCCH), and Forward ...

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Abstract

The invention discloses a method, a device and a system for signal shielding of a wireless communication system. The method comprises the steps of: obtaining community configuration information of the wireless communication system in a shielded range by monitoring signals of the wireless communication system in the shielded range; generating all or part of downlink public channel signals and / or public signals with the same format as a target shielded community according to corresponding community configuration information of the target shielded community in the community configuration information; and sending the generated downlink public channel signals and / or public signals to the shielded range. The invention also discloses a device and a system for signal shielding of the wireless communication system. By adopting the method, the device and the system, the specific targeted downlink interference can be performed on the signals of the wireless communication system to be shielded, the interference to uplink signals of a base station of the wireless communication system and the interference to the wireless communication system needing no interference can be avoided, and the interference transmission power can be reduced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a signal shielding method, device and system of a wireless communication system. Background technique [0002] In modern society, terminals of wireless communication systems such as mobile phones have increasingly become indispensable and important tools in people's work and life. It is self-evident that the widespread use of mobile phones brings convenience in communication, but at the same time it also creates many hidden dangers that cannot be ignored. For example, in prisons, detention centers, examination sites, gas stations, gas stations, chemical warehouses, power dispatching rooms, hospital clinics, wards, operating rooms, as well as national intelligence agencies, military and important government departments, civil aviation control departments, etc. In any place, the signal of the mobile terminal may become a security and confidentiality hidden danger an...

Claims

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Application Information

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IPC IPC(8): H04B1/7077H04B1/7083H04K3/00H04W56/00
CPCY02B60/50
Inventor 赵训威
Owner 赵训威
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